import axios, { AxiosInstance, AxiosError, AxiosRequestConfig, InternalAxiosRequestConfig, AxiosResponse } from 'axios'
import { showFullScreenLoading, tryHideFullScreenLoading } from '@/components/Loading/fullScreen'
import { ElMessage } from 'element-plus'
import { ResultData } from '@/api/interface'
import { ResultEnum } from '@/enums/httpEnum'
import { checkStatus } from './helper/checkStatus'
import { useUserStore } from '@/stores/modules/user'
import router from '@/routers'
import { INIT_URL } from '@/config'
import { Base64 } from 'js-base64'
import { logout, clearToken } from '@/utils/token'
import qs from 'qs'

export interface CustomAxiosRequestConfig extends InternalAxiosRequestConfig {
  loading?: boolean
}

const config = {
  // 默认地址请求地址，可在 .env.** 文件中修改
  baseURL: import.meta.env.VITE_API_URL as string,
  // 设置超时时间
  timeout: ResultEnum.TIMEOUT as number,
  // 跨域时候允许携带凭证
  withCredentials: true
}

class RequestHttp {
  service: AxiosInstance
  public constructor(config: AxiosRequestConfig) {
    // instantiation
    this.service = axios.create(config)

    /**
     * @description 请求拦截器
     * 客户端发送请求 -> [请求拦截器] -> 服务器
     * token校验(JWT) : 接受服务器返回的 token,存储到 vuex/pinia/本地储存当中
     */
    this.service.interceptors.request.use(
      (config: CustomAxiosRequestConfig) => {
        const userStore = useUserStore()

        // 当前请求不需要显示 loading，在 api 服务中通过指定的第三个参数: { loading: false } 来控制
        config.loading ?? (config.loading = true)
        config.loading && showFullScreenLoading()
        if (config.headers && typeof config.headers.set === 'function') {
          if (userStore.token) {
            config.headers.set('Authorization', 'Bearer ' + userStore.token)
          }
          if (userStore.userInfo && import.meta.env.DEV) {
            config.headers.set('User-Info', Base64.encode(JSON.stringify(userStore.userInfo)))
          }
        }
        if (config.params) {
          config.paramsSerializer = params => qs.stringify(params, { indices: false })
        }
        return config
      },
      (error: AxiosError) => {
        return Promise.reject(error)
      }
    )

    /**
     * @description 响应拦截器
     *  服务器换返回信息 -> [拦截统一处理] -> 客户端JS获取到信息
     */
    this.service.interceptors.response.use(
      (response: AxiosResponse) => {
        if (response.data instanceof ArrayBuffer) {
          tryHideFullScreenLoading()
          return response
        }
        const { data } = response
        tryHideFullScreenLoading()
        if (data.code == undefined || data.code == ResultEnum.ERROR) {
          ElMessage.error(data.msg)
          return Promise.reject(data)
        }
        // 登陆失效
        if (data.code == ResultEnum.OVERDUE) {
          // todo
          logout(false)
          // router.replace(LOGIN_URL)
          ElMessage.error(data.msg)
          return Promise.reject(data)
        } else if (data.code == ResultEnum.LICENSE) {
          ElMessage.error('License异常，请重新授权')
          router.replace(INIT_URL)
          return
        } else if (data.code == ResultEnum.KICKED) {
          clearToken()
          router.replace('/101')
          return
        }
        // 全局错误信息拦截（防止下载文件的时候返回数据流，没有 code 直接报错）当2~99是自己处理错误，其他统一处理
        if (data.code && data.code !== ResultEnum.SUCCESS && data.code > 100) {
          ElMessage.error(data.msg)
          return Promise.reject(data)
        }
        // 成功请求（在页面上除非特殊情况，否则不用处理失败逻辑）
        return data
      },
      async (error: AxiosError) => {
        const { response } = error
        tryHideFullScreenLoading()
        // 请求超时 && 网络错误单独判断，没有 response
        if (error.message.indexOf('timeout') !== -1) ElMessage.error('请求超时！请您稍后重试')
        if (error.message.indexOf('Network Error') !== -1) ElMessage.error('网络错误！请您稍后重试')
        // 根据服务器响应的错误状态码，做不同的处理
        if (response) checkStatus(response.status)
        // 服务器结果都没有返回(可能服务器错误可能客户端断网)，断网处理:可以跳转到断网页面
        if (!window.navigator.onLine) router.replace('/500')
        return Promise.reject(error)
      }
    )
  }

  /**
   * @description 常用请求方法封装
   */
  get<T>(url: string, params?: object, _object = {}): Promise<ResultData<T>> {
    return this.service.get(url, { params, ..._object })
  }
  post<T>(url: string, params?: object | string, _object = {}): Promise<ResultData<T>> {
    return this.service.post(url, params, _object)
  }
  put<T>(url: string, params?: object, _object = {}): Promise<ResultData<T>> {
    return this.service.put(url, params, _object)
  }
  delete<T>(url: string, params?: any, _object = {}): Promise<ResultData<T>> {
    return this.service.delete(url, { params, ..._object })
  }
  download(url: string, params?: object, _object = {}): Promise<BlobPart> {
    return this.service.post(url, params, { ..._object, responseType: 'blob' })
  }
}

export default new RequestHttp(config)
